--- /dev/null
+/**
+ * \file fsw_posix.c
+ * POSIX user space host environment code.
+ */
+
+/*-
+ * Copyright (c) 2006 Christoph Pfisterer
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the
+ * distribution.
+ *
+ * * Neither the name of Christoph Pfisterer nor the names of the
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "fsw_posix.h"
+
+
+#ifndef FSTYPE
+/** The file system type name to use. */
+#define FSTYPE ext2
+#endif
+
+
+// function prototypes
+
+fsw_status_t fsw_posix_open_dno(struct fsw_posix_volume *pvol, const char *path, int required_type,
+ struct fsw_shandle *shand);
+
+void fsw_posix_change_blocksize(struct fsw_volume *vol,
+ fsw_u32 old_phys_blocksize, fsw_u32 old_log_blocksize,
+ fsw_u32 new_phys_blocksize, fsw_u32 new_log_blocksize);
+fsw_status_t fsw_posix_read_block(struct fsw_volume *vol, fsw_u32 phys_bno, void *buffer);
+
+/**
+ * Dispatch table for our FSW host driver.
+ */
+
+struct fsw_host_table fsw_posix_host_table = {
+ FSW_STRING_TYPE_ISO88591,
+
+ fsw_posix_change_blocksize,
+ fsw_posix_read_block
+};
+
+extern struct fsw_fstype_table FSW_FSTYPE_TABLE_NAME(FSTYPE);
+
+
+/**
+ * Mount function.
+ */
+
+struct fsw_posix_volume * fsw_posix_mount(const char *path, struct fsw_fstype_table *fstype_table)
+{
+ fsw_status_t status;
+ struct fsw_posix_volume *pvol;
+
+ // allocate volume structure
+ status = fsw_alloc_zero(sizeof(struct fsw_posix_volume), (void **)&pvol);
+ if (status)
+ return NULL;
+ pvol->fd = -1;
+
+ // open underlying file/device
+ pvol->fd = open(path, O_RDONLY, 0);
+ if (pvol->fd < 0) {
+ fprintf(stderr, "fsw_posix_mount: %s: %s\n", path, strerror(errno));
+ fsw_free(pvol);
+ return NULL;
+ }
+
+ // mount the filesystem
+ if (fstype_table == NULL)
+ fstype_table = &FSW_FSTYPE_TABLE_NAME(FSTYPE);
+ status = fsw_mount(pvol, &fsw_posix_host_table, fstype_table, &pvol->vol);
+ if (status) {
+ fprintf(stderr, "fsw_posix_mount: fsw_mount returned %d\n", status);
+ fsw_free(pvol);
+ return NULL;
+ }
+
+ return pvol;
+}
+
+/**
+ * Unmount function.
+ */
+
+int fsw_posix_unmount(struct fsw_posix_volume *pvol)
+{
+ if (pvol->vol != NULL)
+ fsw_unmount(pvol->vol);
+ fsw_free(pvol);
+ return 0;
+}
+
+/**
+ * Open a named regular file.
+ */
+
+struct fsw_posix_file * fsw_posix_open(struct fsw_posix_volume *pvol, const char *path, int flags, mode_t mode)
+{
+ fsw_status_t status;
+ struct fsw_posix_file *file;
+
+ // TODO: check flags for unwanted values
+
+ // allocate file structure
+ status = fsw_alloc(sizeof(struct fsw_posix_file), &file);
+ if (status)
+ return NULL;
+ file->pvol = pvol;
+
+ // open the file
+ status = fsw_posix_open_dno(pvol, path, FSW_DNODE_TYPE_FILE, &file->shand);
+ if (status) {
+ fprintf(stderr, "fsw_posix_open: open_dno returned %d\n", status);
+ fsw_free(file);
+ return NULL;
+ }
+
+ return file;
+}
+
+/**
+ * Read data from a regular file.
+ */
+
+ssize_t fsw_posix_read(struct fsw_posix_file *file, void *buf, size_t nbytes)
+{
+ fsw_status_t status;
+ fsw_u32 buffer_size;
+
+ buffer_size = nbytes;
+ status = fsw_shandle_read(&file->shand, &buffer_size, buf);
+ if (status)
+ return -1;
+ return buffer_size;
+}
+
+/**
+ * Change position within a regular file.
+ */
+
+off_t fsw_posix_lseek(struct fsw_posix_file *file, off_t offset, int whence)
+{
+ fsw_u64 base_offset = 0;
+
+ // get base offset
+ base_offset = 0;
+ if (whence == SEEK_CUR)
+ base_offset = file->shand.pos;
+ else if (whence == SEEK_END)
+ base_offset = file->shand.dnode->size;
+
+ // calculate new offset, prevent seeks before the start of the file
+ if (offset < 0 && -offset > base_offset)
+ file->shand.pos = 0;
+ else
+ file->shand.pos = base_offset + offset;
+
+ return file->shand.pos;
+}
+
+/**
+ * Close a regular file.
+ */
+
+int fsw_posix_close(struct fsw_posix_file *file)
+{
+ fsw_shandle_close(&file->shand);
+ fsw_free(file);
+ return 0;
+}
+
+/**
+ * Open a directory for iteration.
+ */
+
+struct fsw_posix_dir * fsw_posix_opendir(struct fsw_posix_volume *pvol, const char *path)
+{
+ fsw_status_t status;
+ struct fsw_posix_dir *dir;
+
+ // allocate file structure
+ status = fsw_alloc(sizeof(struct fsw_posix_dir), &dir);
+ if (status)
+ return NULL;
+ dir->pvol = pvol;
+
+ // open the directory
+ status = fsw_posix_open_dno(pvol, path, FSW_DNODE_TYPE_DIR, &dir->shand);
+ if (status) {
+ fprintf(stderr, "fsw_posix_opendir: open_dno returned %d\n", status);
+ fsw_free(dir);
+ return NULL;
+ }
+
+ return dir;
+}
+
+/**
+ * Read the next entry from a directory.
+ */
+
+struct dirent * fsw_posix_readdir(struct fsw_posix_dir *dir)
+{
+ fsw_status_t status;
+ struct fsw_dnode *dno;
+ static struct dirent dent;
+
+ // get next entry from file system
+ status = fsw_dnode_dir_read(&dir->shand, &dno);
+ if (status) {
+ if (status != 4)
+ fprintf(stderr, "fsw_posix_readdir: fsw_dnode_dir_read returned %d\n", status);
+ return NULL;
+ }
+ status = fsw_dnode_fill(dno);
+ if (status) {
+ fprintf(stderr, "fsw_posix_readdir: fsw_dnode_fill returned %d\n", status);
+ fsw_dnode_release(dno);
+ return NULL;
+ }
+
+ // fill dirent structure
+ dent.d_fileno = dno->dnode_id;
+ dent.d_reclen = 8 + dno->name.size + 1;
+ switch (dno->type) {
+ case FSW_DNODE_TYPE_FILE:
+ dent.d_type = DT_REG;
+ break;
+ case FSW_DNODE_TYPE_DIR:
+ dent.d_type = DT_DIR;
+ break;
+ case FSW_DNODE_TYPE_SYMLINK:
+ dent.d_type = DT_LNK;
+ break;
+ default:
+ dent.d_type = DT_UNKNOWN;
+ break;
+ }
+#if 0
+ dent.d_namlen = dno->name.size;
+#endif
+ memcpy(dent.d_name, dno->name.data, dno->name.size);
+ dent.d_name[dno->name.size] = 0;
+
+ return &dent;
+}
+
+/**
+ * Rewind a directory to the start.
+ */
+
+void fsw_posix_rewinddir(struct fsw_posix_dir *dir)
+{
+ dir->shand.pos = 0;
+}
+
+/**
+ * Close a directory.
+ */
+
+int fsw_posix_closedir(struct fsw_posix_dir *dir)
+{
+ fsw_shandle_close(&dir->shand);
+ fsw_free(dir);
+ return 0;
+}
+
+/**
+ * Open a shand of a required type by path.
+ */
+
+fsw_status_t fsw_posix_open_dno(struct fsw_posix_volume *pvol, const char *path, int required_type, struct fsw_shandle *shand)
+{
+ fsw_status_t status;
+ struct fsw_dnode *dno;
+ struct fsw_dnode *target_dno;
+ struct fsw_string lookup_path;
+
+ lookup_path.type = FSW_STRING_TYPE_ISO88591;
+ lookup_path.len = strlen(path);
+ lookup_path.size = lookup_path.len;
+ lookup_path.data = (void *)path;
+
+ // resolve the path (symlinks along the way are automatically resolved)
+ status = fsw_dnode_lookup_path(pvol->vol->root, &lookup_path, '/', &dno);
+ if (status) {
+ fprintf(stderr, "fsw_posix_open_dno: fsw_dnode_lookup_path returned %d\n", status);
+ return status;
+ }
+
+ // if the final node is a symlink, also resolve it
+ status = fsw_dnode_resolve(dno, &target_dno);
+ fsw_dnode_release(dno);
+ if (status) {
+ fprintf(stderr, "fsw_posix_open_dno: fsw_dnode_resolve returned %d\n", status);
+ return status;
+ }
+ dno = target_dno;
+
+ // check that it is a regular file
+ status = fsw_dnode_fill(dno);
+ if (status) {
+ fprintf(stderr, "fsw_posix_open_dno: fsw_dnode_fill returned %d\n", status);
+ fsw_dnode_release(dno);
+ return status;
+ }
+ if (dno->type != required_type) {
+ fprintf(stderr, "fsw_posix_open_dno: dnode is not of the requested type\n");
+ fsw_dnode_release(dno);
+ return FSW_UNSUPPORTED;
+ }
+
+ // open shandle
+ status = fsw_shandle_open(dno, shand);
+ if (status) {
+ fprintf(stderr, "fsw_posix_open_dno: fsw_shandle_open returned %d\n", status);
+ }
+ fsw_dnode_release(dno);
+ return status;
+}
+
+/**
+ * FSW interface function for block size changes. This function is called by the FSW core
+ * when the file system driver changes the block sizes for the volume.
+ */
+
+void fsw_posix_change_blocksize(struct fsw_volume *vol,
+ fsw_u32 old_phys_blocksize, fsw_u32 old_log_blocksize,
+ fsw_u32 new_phys_blocksize, fsw_u32 new_log_blocksize)
+{
+ // nothing to do
+}
+
+/**
+ * FSW interface function to read data blocks. This function is called by the FSW core
+ * to read a block of data from the device. The buffer is allocated by the core code.
+ */
+
+fsw_status_t fsw_posix_read_block(struct fsw_volume *vol, fsw_u32 phys_bno, void *buffer)
+{
+ struct fsw_posix_volume *pvol = (struct fsw_posix_volume *)vol->host_data;
+ off_t block_offset, seek_result;
+ ssize_t read_result;
+
+ FSW_MSG_DEBUGV((FSW_MSGSTR("fsw_posix_read_block: %d (%d)\n"), phys_bno, vol->phys_blocksize));
+
+ // read from disk
+ block_offset = (off_t)phys_bno * vol->phys_blocksize;
+ seek_result = lseek(pvol->fd, block_offset, SEEK_SET);
+ if (seek_result != block_offset)
+ return FSW_IO_ERROR;
+ read_result = read(pvol->fd, buffer, vol->phys_blocksize);
+ if (read_result != vol->phys_blocksize)
+ return FSW_IO_ERROR;
+
+ return FSW_SUCCESS;
+}
+
+
+/**
+ * Time mapping callback for the fsw_dnode_stat call. This function converts
+ * a Posix style timestamp into an EFI_TIME structure and writes it to the
+ * appropriate member of the EFI_FILE_INFO structure that we're filling.
+ */
+
+/*
+static void fsw_posix_store_time_posix(struct fsw_dnode_stat *sb, int which, fsw_u32 posix_time)
+{
+ EFI_FILE_INFO *FileInfo = (EFI_FILE_INFO *)sb->host_data;
+
+ if (which == FSW_DNODE_STAT_CTIME)
+ fsw_posix_decode_time(&FileInfo->CreateTime, posix_time);
+ else if (which == FSW_DNODE_STAT_MTIME)
+ fsw_posix_decode_time(&FileInfo->ModificationTime, posix_time);
+ else if (which == FSW_DNODE_STAT_ATIME)
+ fsw_posix_decode_time(&FileInfo->LastAccessTime, posix_time);
+}
+*/
+
+/**
+ * Mode mapping callback for the fsw_dnode_stat call. This function looks at
+ * the Posix mode passed by the file system driver and makes appropriate
+ * adjustments to the EFI_FILE_INFO structure that we're filling.
+ */
+
+/*
+static void fsw_posix_store_attr_posix(struct fsw_dnode_stat *sb, fsw_u16 posix_mode)
+{
+ EFI_FILE_INFO *FileInfo = (EFI_FILE_INFO *)sb->host_data;
+
+ if ((posix_mode & S_IWUSR) == 0)
+ FileInfo->Attribute |= EFI_FILE_READ_ONLY;
+}
+*/
+
+/**
+ * Common function to fill an EFI_FILE_INFO with information about a dnode.
+ */
+
+/*
+EFI_STATUS fsw_posix_dnode_fill_FileInfo(IN FSW_VOLUME_DATA *Volume,
+ IN struct fsw_dnode *dno,
+ IN OUT UINTN *BufferSize,
+ OUT VOID *Buffer)
+{
+ EFI_STATUS Status;
+ EFI_FILE_INFO *FileInfo;
+ UINTN RequiredSize;
+ struct fsw_dnode_stat sb;
+
+ // make sure the dnode has complete info
+ Status = fsw_posix_map_status(fsw_dnode_fill(dno), Volume);
+ if (EFI_ERROR(Status))
+ return Status;
+
+ // TODO: check/assert that the dno's name is in UTF16
+
+ // check buffer size
+ RequiredSize = SIZE_OF_EFI_FILE_INFO + fsw_posix_strsize(&dno->name);
+ if (*BufferSize < RequiredSize) {
+ // TODO: wind back the directory in this case
+
+ *BufferSize = RequiredSize;
+ return EFI_BUFFER_TOO_SMALL;
+ }
+
+ // fill structure
+ ZeroMem(Buffer, RequiredSize);
+ FileInfo = (EFI_FILE_INFO *)Buffer;
+ FileInfo->Size = RequiredSize;
+ FileInfo->FileSize = dno->size;
+ FileInfo->Attribute = 0;
+ if (dno->type == FSW_DNODE_TYPE_DIR)
+ FileInfo->Attribute |= EFI_FILE_DIRECTORY;
+ fsw_posix_strcpy(FileInfo->FileName, &dno->name);
+
+ // get the missing info from the fs driver
+ ZeroMem(&sb, sizeof(struct fsw_dnode_stat));
+ sb.store_time_posix = fsw_posix_store_time_posix;
+ sb.store_attr_posix = fsw_posix_store_attr_posix;
+ sb.host_data = FileInfo;
+ Status = fsw_posix_map_status(fsw_dnode_stat(dno, &sb), Volume);
+ if (EFI_ERROR(Status))
+ return Status;
+ FileInfo->PhysicalSize = sb.used_bytes;
+
+ // prepare for return
+ *BufferSize = RequiredSize;
+ return EFI_SUCCESS;
+}
+*/
+
+// EOF